EP 0056300 A1 19820721 - Control of real time processes.
Title (en)
Control of real time processes.
Title (de)
Echtkeit-Prozesssteuerung.
Title (fr)
Commande de processus en temps réel.
Publication
Application
Priority
GB 8100677 A 19810109
Abstract (en)
A control apparatus (30) and method for controlling a real time process (or other controllable activity) of which the operation can be defined by a set of P logical statements of the form STATE(N) + OMI(N,N+1) = STATE(N+1) where -N may have any integral value up to P, - STATE(N),OMI(N,N+1) and STATE(N+1) are all logical variables, and -OMI(N) is the conjunctive OPERATING MODE INCREMENT that is necessary to the progress of the system from STATE(N) to STATE(N+1) and in which SET only one such STATE variable at a time can be recognised as having the value TRUE; in which apparatus and method the following steps are performed: (i) evaluating in turn each successive STATE in at least a group of said STATES in the SET on the basis of feedback data relating to current values of various relevant parameters of the process and the current TRUE STATE, by a) determining the logical value of the preceding STATE or STATES on which said STATE is dependent, b) determining the logical value of the or each OPERATING MODE INCREMENT on which said STATE is dependent, and c) evaluating the logical statement defining said STATE, using the logical values just determined for the or each preceding STATE and the associated OPERATING MODE INCREMENT to determinethe logical value of said STATE; and (ii) initiating any relevant and necessary control action on finding a STATE having the logical value TRUE. Preferably, the identity of the STATE currently having the TRUE value is stored (location 60), and step (i) (a) aboce is performed by omparing with that stored identity the identity of the or each said preceding STATE. The control of a coal-fired furnace (10) by such method and apparatus (30) is described.
IPC 1-7
IPC 8 full level
G05B 15/02 (2006.01); G05B 19/05 (2006.01); G06F 19/00 (2011.01)
CPC (source: EP)
G05B 19/05 (2013.01)
Citation (search report)
- FR 2321722 A1 19770318 - CIBIE PROJECTEURS [FR]
- DE 2714069 A1 19771013 - INSURANCE TECH BUREAU
- Datenverarbeitung AEG-Telefunken, Vol. 7, No. 2/3, 1975 Berlin (DE) J. DONERT et al.: "SA 80, ein Programmpaket fur Digitale Steuerungen" pages 54-57 * page 55, middel column, lines 1-31 *
Designated contracting state (EPC)
AT BE CH DE FR IT LI LU NL SE
DOCDB simple family (publication)
EP 0056300 A1 19820721; AU 549603 B2 19860130; AU 7938382 A 19820802; BR 8207743 A 19830510; ES 508600 A0 19830201; ES 8303732 A1 19830201; GB 2091444 A 19820728; GB 2091444 B 19850306; JP S58500090 A 19830113; NO 823034 L 19820908; NZ 199439 A 19851108; WO 8202443 A1 19820722; ZA 82135 B 19821124
DOCDB simple family (application)
EP 82300053 A 19820106; AU 7938382 A 19820106; BR 8207743 A 19820106; ES 508600 A 19820108; GB 8100677 A 19810109; GB 8200003 W 19820106; JP 50024982 A 19820106; NO 823034 A 19820908; NZ 19943982 A 19820107; ZA 82135 A 19820108